Manfibular And Maxillofacial Trauma - Chapter 29

Question 1

Anatomy

Which important structures to consider when doing a ventral approach to caudal part of the **body **and to ramus of mandible

Answer 1

Rostral belly of digastricus muscle on ventromedial aspect of mandible
Masseter muscle on lateral aspect
Sublingual artery - branch of facial artery that cross rostral belly of digastricus muscle in rostromedial direction

Question 2

acyrlic splint

What does the Light cure material rely on ?

Answer 2

**Rely on photosensitisation of material and release free radicals that facilitates polymerization

Question 3

Light cure material

Answer 3

nm Rely on photosensitisation of material and release free radicals that facilitates polymerizatiob

Need 400-500 nm light source

Question 4

How does the Chemical cure composite material work?

Answer 4

Polymerise through mixing of two pastes , one is the activator, other contains initiator

Question 5

What technique is this and when to use it

Answer 5

**Stout (multiple) wiring technique
**Used for greater distance
Minimum of 2 teeth on either fracture side

Question 6

Answer 6

Ivy loop technique
stabilize and align adjacent teeth

Question 7

Answer 7

****Risdon wire technique **
2 twisted wire are joined rostrally
greater strength of reduction is required
e.g. rostral and symphyseal fracture

Question 8

Answer 8

Essig technique
loosened incisor from a trauma, fracture reduction
avulsed, fractured, luxated canine teeth

Question 9

Answer 9

Essig technique

Question 10

Answer 10

Modified Stout loop technique

Question 11

Answer 11

Risdon wire technique

Question 12

What is the tension band principle?

Answer 12

an implant - wire/plate function according to tension band principle - when bone undergoes bending load- the implant attached to the convex surface of the bone -resists the tensile forces

Fixation devises are the strongest when loaded at tension side

Question 13

What sis meant by Champy’s technique ?

Answer 13

o Champy’s technique- on using miniplates and screws and placing the hardware along buttresses (lines of osteosynthesis) for stabilization

Question 14

What is known as creeping substitution in bone graft ?

Answer 14

**allograft gets replaced by autogenous bone
o This slow integration is known as creeping substitution

Question 15

What is the % of mandibular fractures of all fractures in dogs?

Answer 15

2.5-2.7% of mandibular fractures of total fractures in dogs

Question 16

True or false? mandibular fractures are 9 x more common than maxilla fractures in dogs

Answer 16

True

Question 17

Tundo et al 2019 study Location and distribution of craniomaxillfacial

How many cats were presented for skull and mandibular fracture?

Answer 17

80 % of cats had skull fracture & 86.7% of cats had mandibular fracture **

Question 18

Tunde et al location and distribution of craniomaxillary fracture in 45 cats JIMS 2019

How many cats and TMJ fractures ?

Answer 18

57.8% had TMJ fractures affecting 1 or both TMJ

Question 19

Tunde et al location and distribution of craniomaxillary fracture in 45 cats JIMS 2019

How many cats had tooth fractures and eye injuries?

Answer 19

64.4% of cats had tooth fractures
15.6% had significant eye injuries

Question 20

Tunde et al location and distribution of craniomaxillary fracture in 45 cats JIMS 2019

How many mandibular fractures? bilateral? other fractures?

Answer 20

86.7% of total mandibular fracture, 74.4% had 2 or more mandibular fractures, there was 84.6% chance of another fracture present and 73.1 % chance of skull fracture

caudal mandibular fracture most common

Question 21

Is this a stable or unstable mandibular fracture?

Answer 21

Unstable mandibular fracture - rostroventral orientation

Question 22

is this a favorable or unfavorable fracture?

Answer 22

Unfavorable - caudoventral